Revealed on November 2, 2006, THE OFFICIAL Warcraft Encyclopedia is a source for Warcraft lore. It is part of the History of Warcraft which is made up of all the published sources so far. Most of the information there is about elves.
Since the release of the first Warcraft game, the lore of the Warcraft universe has been evolving and expanding at an incredible rate. Today, Warcraft lore is spread across four games and three expansions as well as a number of novels, a pen-and-paper roleplaying game, and even a manga series. Now you can find all there is to know about Warcraft in one official source of all things Warcraft: The Warcraft Encyclopedia. In time we hope it will grow to be the ultimate resource for all your Warcraft story and lore needs.
Lack of recent update activity (as of early 2008) seems to indicate Blizzard has either put this project on hold or temporarily removed resources committed to expanding it.
A transcription of it can be found at The Warcraft Encyclopedia.
While the original article did not survive the overhaul of the World of Warcraft Official Website, the Warcraft Encyclopedia is still considered canonical by Blizzard, and may be expanded upon in the future.